Replace SkPicture(SkStream) constructors with a factory.

SkPicture:
Remove the constructors which take an SkStream as an argument. Rather
than having to check a variable for success, the factory will return
NULL on failure.
Add a protected function for determining if an SkStream is an SKP
to share code with SkTimedPicture.
In the factory, check for a NULL SkStream.
Use a default decoder (from BUG:
https://code.google.com/p/skia/issues/detail?id=1325)

SkDebuggerGUI:
Call SkPicture::CreateFromStream when necessary.
Write a factory for creating SkTimedPictures and use it.

Use the factory throughout tools.

Add include/lazy to utils and effects gyp include_dirs so SkPicture.h
can reference SkImageDecoder.h which references SkBitmapFactory.h (in
include/lazy).

Changes code Chromium uses, so this will require a temporary Skia
and then a change to Chromium to use the new Skia code.

TODO: Create a decoder that does nothing to be used by pinspect,
lua pictures, etc, and allow it to not assert in SkOrderedReadBuffer.

R=reed@google.com

Review URL: https://codereview.chromium.org/17113004

git-svn-id: http://skia.googlecode.com/svn/trunk@9822 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/render_pdfs_main.cpp b/tools/render_pdfs_main.cpp
index 1821548..f443502 100644
--- a/tools/render_pdfs_main.cpp
+++ b/tools/render_pdfs_main.cpp
@@ -9,7 +9,6 @@
 #include "SkDevice.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
-#include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkOSFile.h"
 #include "SkPicture.h"
@@ -169,11 +168,9 @@
         return false;
     }
 
-    bool success = false;
-    SkAutoTUnref<SkPicture>
-        picture(SkNEW_ARGS(SkPicture, (&inputStream, &success, &SkImageDecoder::DecodeMemory)));
+    SkAutoTUnref<SkPicture> picture(SkPicture::CreateFromStream(&inputStream));
 
-    if (!success) {
+    if (NULL == picture.get()) {
         SkDebugf("Could not read an SkPicture from %s\n", inputPath.c_str());
         return false;
     }
@@ -185,7 +182,7 @@
 
     renderer.render();
 
-    success = write_output(outputDir, inputFilename, renderer);
+    bool success = write_output(outputDir, inputFilename, renderer);
 
     renderer.end();
     return success;